Graphical user interface for a display screen or portion thereof



FIG. 1 is a front view of a graphical user interface for a display screen or portion thereof; and,

FIG. 2 is a front view of the graphical user interface for a display screen or portion thereof of FIG. 1 illustrating different unclaimed portions including patient vitals or values.

The features shown in broken lines form no part of the claimed design. 

CLAIM The ornamental design for a graphical user interface for a display screen or portion thereof, as shown and described. 